Bron-derw-goed is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 31 January 1997. House.
Bron-derw-goed
- WRENN ID
- third-loft-finch
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 31 January 1997
- Type
- House
- Address
- Bron-derw-goed, Bont Dolgadfan, Llanbrynmair
- OS grid reference
- SN 878 988
- Coordinates
- 52.57551, -3.65585
- Source
- Cadw listing
Description
Bron-derw-goed is a house with an outbuilding that forms a long range of whitewashed stone rubble construction, topped with a slate roof. This structure underwent remodelling in the early to mid 19th century. The layout features a lobby entry plan, with a boarded door and an overlight positioned in front of the main stack, which has been rebuilt in blue brick. The windows are variously paned timber, set in openings with brick segmental heads and recessed from the wall's face.
Inside, the living hall showcases deeply chamfered parallel spine beams and a timber-framed cross partition leading to the inner rooms. There is a large fireplace with splayed reveals. The roof is constructed with four pairs of crucks, demonstrating high-quality craftsmanship, and includes tie and collar beams, with a full truss exposed in the end bay, referred to as the ty gwau.
Local climate
Bron-derw-goed sits in one of the wettest parts of the UK, with an average of 1,240 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.
It experiences an average of 46 freeze-thaw cycles a year, more than 87% of listed buildings. Of these, 26 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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